When trying to make an account merge request at https://meta.stackexchange.com/contact, I always get this error:
oops! this isn't a link to a valid profile
But the URL link I put in the form is completely valid, such as the following which can be opened https://stackexchange.com/users/1252935/water-stone (although if you click it directly, this link seems to be invalid).
The same question has been asked quite a few times, but a working solution does not seem to exist. An old answer is to add "meta" in the URL, such as https://meta.stackexchange.com/users/1252935/water-stone, but this becomes an invalid URL (although if you click it directly, this link seems to be valid). So, even if adding "meta" happened to work for some people in the past, it does not seem to work in 2022.
I'm asking this question here one more time, in case some expert has a working solution to share, or maybe this issue will be fixed in a better way (at least to make the error message less confusing, even if it does not provide any useful instruction).
To show the issue more clearly, I've added two screenshots showing that the URL with "meta" or without makes no difference at all.